Embroidering-machine.



J. A. GROEBLI.

EMBROIDERING MACHINE.

APPLICATION FILED JULY 12. 1915.

1,298,666 Patented June 5, 1917.

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J. A. GROEBLI.

EMBROIDERING MACHINE. APPLICATION FILED JULY 12. I916.

Patented J 1116 5, 1917.

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EMBROIDERING-MACHINE.

Specification of Letters Patent.

Patented June 5, 1917.

Application flle'd July 12, 1916. Serial No. 108,777.

tambour frame to or toward an initialposition. And my improvements are directed particularly to means for optionally bringing about these two operations of shifting the fabric and returning the tambour frame to a greater or less extent simultaneously.

One system of means for accomplishing these results is shown in my Letters Patent No. 1,166,676 of January 4th, 1916, wherein the return of the tambour frame toward its initial position is accomplished through socalled automat mechanism by which it is moved into its successive stitch positions. And my present invention is intended as an improvement on the mechanism of that patent whereby thereturning of the tambour frame may be brought about directly through the fabric shifting mechanism,to such an extent as the operator may wish, and simultaneously with the shifting of the fabric and irrespective of the particular means that may be employed for moving the tambour frame into its successive stitch positions which may be accomplished in either of the well known manners, for instance, by the employment of a pantograph apparatus, such as is, illustrated in my Letters Patent No. 1,137,312 ofApril 27th, 1915.

In the drawings Figure 1 is a front view of one end of a tambour frame embodying my invention; Fig. 2 is a back view of the same, the floor bracket and bar being omitted; Fig. 3- is an end view of the same looking to the right on Fig. 1; and Fig. 41 is a front elevation of the frame, frame and positioning mechanism of an emtambour.

broidering machine, centrally shortened, and partially broken away for clearness.

In the tambour frame 2 are mounted two pairs of fabric rollers 3, 1 and 3, 4, the lower roller 4 of each pair being shown provided with the worm gear 6 driven by a worm 8 on a vertical shaft 10 carrying a worm gear 12 meshing with a worm 14 on the shaft 15. These portions of my apparatus correspond with the parts which are similarly numbered in my Patent No. 1,166,676; and I desire it to be understood that the upper fabric rollers 3, 3 may be driven from ends not shown in my present application by similar means, such as are shown in my aforesaid Letters Patent. The bar 18 is provided with a threaded extension 19 passing up through a bracket 20 and through a hubbed worm gear 21 meshing with a worm 22 carried by the shaft16, which is the shaft for applying the vertical'tension to the fabric. This bar 18 isprovided with a pair of arms 23, 23 pierced to slide upon the shaft 10, and embracing the worm 8 so as to raise or lower the worm and shaft bodily when the shaft 19 is drawn up or down through the worm gear 21 as the latter is rotated by worm 22 upon shaft 16.

The construction of my apparatus thus far is in accordance with the mechanisms already illustrated by me in previous patents, this description having been given for the purpose of clearness in explaining the ap plication of my improvements. And it may be here stated that the shafts 15, 16 and 17 represent shafts, common in machines of this class, whereby, respectively, the fabric is reeled, and the vertical tension and the horizontal tension are applied and released.

The particular means by which these shafts 15, 16 and 17 are driven is not material to my present invention.

In the drawings I have shown each shaft as provided with a beveled gear adapted to mesh with a corresponding beveled gear upon a driving shaft not shown.

In operation the upper fabric rollers 3, 3 turn in an anti-clockwise direction when looked at in the position shown in Fig. 3. The shaft of the upper roller of the lower Wpair is p ovided with an extra gear 30 mountedat' itsjend and traveling with 1t.

- Aguidin'g rod 31 isjmounted in brackets 32 secured beneath the machine, as upon the floor; A bar 33 has a hub 34 adapted to slide and rotate upon the rod 31 so that the bar 33 maybe swung to andfro upon and also moved along the rod 31.

This rod 33 extends up between guide fingers 35, 35 n the lower part of thetambour frame, and through an opening in an arm 36 of a lever37 mounted upon a pivot 38 attached to the side/of the "tambour frame. Therefore the rod 33 will be moved laterally with the tambour frame by the arm 46 of the lever 37 ,Q and this arm 46 is normally drawn down by a tense spring 47, one end of which is attached to the arm 46 while the other'end is attached, to a lug on the tambour frame.

It will be seen, therefore, that when the lever 37 is swung in toward, the 'tambour frame, the rack39 may be brought into on gagement with the gear 30; and when the movement of lever is reversed the rack and gear ma be separated. V

The adjustment. of the parts is such that x I whenthe' vertical'ten'sioning has been completed by the drawing [upward of the bar 18, by the worm gear 21 threaded upon its upper end, the arm 45 will raise the arm 46, thereby rocking out the lever 37 so as to separate the rack 39 from the gear 30; while, when the vertical tension has been released by the lowering of the bar 18, the arm 45 will permit the arm 46 to be drawn down sufficiently by the spring 47 so that the rack 39 be brought into mesh with the g r I l,

The tambour frame 2, may be mounted,

counterbalanced and, positioned in any well known manner, In Fig. 4 I have shown it as mounted 1n a frame 50, guide arms 51, 51

I on the .tambour, frame passingthrough vertical slots inrthe uprights of the frame 50,

- thetops and'bottoms of which slots are indicated by broken lines 52,52. This permits the tambour frame to be raised and lowered, its guide arms 51,51 sliding in the slots.- Rods 53, 53 are pivoted to the top of the tambour frame and to bell cranks 54, 54,

. connected by a bar 55. Andoneof the bell cranks 54 is provided with a counterbalance "weight 56. i This mechanism serves totalance the tambour frameso that it mayeasily be moved vertically or laterally. I

A pantograph apparatus 57, 58, 59, 60, 1s

pivoted at one end, 61, to a lug of the frame 50, 50, and, at the pivotal point of the bars 58 and 59, to a rod 69 detachably held by a set screw 62 in'a guide 63 fastened to the tambour frame 2. I

At the end of the arm 60is the pattern Y tracer 64. When this tracer is moved step step over the pattern 65, the pantograph 'mechanism will cause corresponding positioning movements to be made by the tan1 bour frame. If desired the pantograph may bedisc'onnected from the tambour frame, by

loosening the set screw 62, before the tambourframe is moved back to its normal, initial position.

' It will be observed that the Shaft 15 is carried across the top of the tambour frame and connected through a second worm 14 with a worm gear 66, similar to the worm gear 12, on the end of shaft 67, which shaft, through worms, corresponding to worms 8, 8 on shaft 10, meshing with worm gears 68, 68 on rollers '3, 3, turn those rollers insync'hronism with the rollers 4, 4. I I

, This arrangement of the machine frame, I.

balancing mechanism and pantograph apparatus is not new. But I have shown it to assist those skilled in the art morereadily to understand the application of my present invention than to do. I

The use of an adjustable connection be tween the panto'graph and the ,tambour frame has long been known inthe art. And illustrations of such adjustable connections they might otherwise be able patent to Heinrich Spiihl, No. 5693 of November 7 1892, where both vertical and lateral'adjustment is provided for, and in the may be found, for instance, in the'Swiss Swiss patent to F. Saurer Siihne, No.

of November 15, 1888.

In practice my apparatus may be operated as follows During the normal operation of embroidering, the rack 39will be thrown free of the gear 30, because thearm 46 is arm 45'; and 'the bar 33 will slide back and forth upon the rod 31 as the tambour frame moves to and fro; while the frame may freely move vertically in relation to the bar.

When it is desiredto shift the, fabric and readjust the tambour frame'back toward its initial position, the bar 18 is slacked downward, thereby releasing the final vertical tension on the fabric just in, advance of the forliftedby the t j Ward reeling movement of the upper fabric rollers 3, 3; This downward movement of the bar 18 allows the lever 37 to be swung in by the spring 47, so as tothrow the rack T 39 into mesh with the gear 30. The fabric end of the toothed part of the rack it may continue to revolve against the plain surface below the rack, the adjustable arrangement of the rack on the bar 33 permitting its adjustment so that the lowering of the tambour frame may be stopped at any predetermined point. Furthermore, the operator may disconnect the rack and gear at any time by swinging out the lever 37, thereby.

also terminating the downward movement of the tambour frame. And, when the reeling of the fabric has been completed and the final vertical tension applied, the raising of the bar 18 will cause the lever 37 to be swung out, thereby throwing and holding the rack 39 out of engagement with the gear 30 so that the embroidering of the next pattern may be proceeded with.

It will be seen, therefore, that by means of my improvements the tambour frame may be automatically returned to a predetermined initial position while the fabric is being shifted, or such return movement may be prevented or limited by the manual control of the operator as circumstances may re quire, and that this may be done irrespective of the means by which the tambour frame is moved step by step during the embroidering operation.

Having thus described my invention, what I claim and desire to secure by Letters Patent of the United States is 1. The combination, in an embroidering machine, of a tambour frame provided with fabric carrying and shifting means, means for moving the tambour frame step by step into stitch positions, and means independent of the tambour frame moving means for automatically returning the tambour frame toward an initial position.

2. Thecombination, in an embroidering machine, of a tambour frame provided with fabric carrying and shifting means, means for moving the tambour frame step by step into stitch positions, and means independent of the tambour frame moving means for optionally automatically returning the tambour frame toward an initial position.

3. The combination, in an embroidering machine, of a tambour frame, fabric carrying and shifting means mounted therein, and means actuated by such fabric carrying and shifting means for moving the tambour frame in a direction reverse to the shift of the fabric.

4:. The combination, in an embroidering moving the tambour controlled means machine, of a tambour frame,fabric carrying and shifting means mounted therein, and automatic means actuated by such fabric carrying and shifting means for moving the tambour frame in a direction reverse to the shift of the fabric.

5. The combination, in an embroidering machine, of a tambour frame, fabric carrying and shifting means mounted therein, and automatic and manually controllable means actuated by such fabric carrying and shifting means for moving, the tambour frame in a direction reverse to the shift of the fabric.

6. The combination, in an embroidering machine, of a tambour frame, fabric carrying and shifting means mounted therein, and means actuated by such fabric carrying and shifting means for automatically moving the tambour frame a predetermined distance in a direction reverse to the shift of the fabric.

7. The combination, in an embroidering machine, of a tambour frame, fabric carrying and shifting means mounted therein, tensioning means for causing the fabric shifting means to apply tension to a fabric, and means automatically controlled by the tensioning means and actuated by the fabric carrying and shifting means for moving the tambour frame in a direction reverse to the shift of the fabric.

8. The combination, in an embroidering machine, of a tambour frame, fabric carrying and shifting means mounted therein, and adjustable means actuated by such fabric carrying and shifting means for frame a predetermined direction reverse to the shift distance 1n a of the fabric.

9. The combination, in an embroidering machine, of a tambour frame, fabric carrying and shifting means mounted therein, and means connected with the tambour frame and optionally connectible and disconnectible from such fabric carrying and shifting means and operable thereby for moving the tambour frame in a direction reverse to the shift of the fabric.

10. The combination, in an embroider-' ing machine, of a tambour frame, fabric shifting rollers carried thereby, tambour frame, readjusting means, and manually for bringing the readjusting means under the operating influence of a shifting roller.

11. The combination, in an embroidering machine, of a tambour frame provided with fabric rollers, a gear carried by one of said rollers, tambour frame retracting means embodying a rack, and means for optionally bringing said rack and gear into operative relation.

12. The combination, in an embroidering I machine, of a talnbour frame provided with fabriorollers, a gear carried by one of said I fabric rollers, a gear carried by oneof said rollers, tambour frame retraotlng means em 10 rollers, tambourframe retracting means embodying a vertically aclgustable rack,' an bodying a vertically adjustable rack, and means for automatically and optionally 5 means for optionally bringing said rack bringing said rack andgearinto operative andgear into operative relation. relation and for terminating their coop era 13'. The combination, in an embroidering tion. a a I p, I 7 machine of a tambour frame provided with I JOSEPH GROEBLI.

, Copies of this patent may lie obtained for fiveicents each, by addressing the "Gommis sioner of Patents,

Washington, D. 0.? 

